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Iridium complex and preparation method thereof, electroluminescent device using iridium complex

A technology of iridium complexes and complexes, applied in the direction of electric solid devices, electrical components, luminescent materials, etc., can solve the problems of efficiency roll-off and efficiency reduction, and achieve the effects of convenient design and production, stable chemical properties, and simple preparation methods

Inactive Publication Date: 2016-08-17
AAC MICROTECH CHANGZHOU +1
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Problems solved by technology

In addition, in the current commonly used materials, the hole mobility of hole transport materials is much higher than that of electron transport materials, and the commonly used host materials are mainly hole transport, which will lead to a large number of redundant holes. Aggregation of holes at the interface between the light-emitting layer and the electron-transporting layer
These factors can lead to reduced efficiency and severe efficiency roll-off
Studies have shown that if the iridium complex has a high electron transport ability, it can effectively increase the transport and distribution of electrons in the light-emitting layer, broaden the electron-hole area, balance the number of electron-hole pairs, and greatly improve the device. efficiency, the reduced efficiency of the roll-off

Method used

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  • Iridium complex and preparation method thereof, electroluminescent device using iridium complex
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Embodiment Construction

[0020] The present invention will be described in further detail below with reference to the drawings and embodiments. Unless otherwise specified, the terms used in the present invention generally have the meanings commonly understood by those of ordinary skill in the art.

[0021] The iridium complex of the present invention uses iridium trichloride, 4,6-ditrifluoromethylpyridine-3-boronic acid, 4,6-ditrifluoromethylpyridine-4-boronic acid, 2- The synthesis methods of bromopyridine derivatives, 2-bromopyrimidine derivatives, 2-bromopyrazine derivatives and 2-bromotriazine derivatives are similar. The iridium complex contains two main ligands and a 2-(5-(3-pyridyl-1,3,4-oxadiazole-2-)phenol auxiliary ligand, and the main ligand is 2 -(4,6-Ditrifluoromethylpyridin)ylpyridine, 2-(4,6-ditrifluoromethylpyridin)ylpyrimidine, 2-(4,6-ditrifluoromethylpyridinyl)pyrazine And any of 2-(4,6-ditrifluoromethylpyridinyl) triazine derivatives; iridium dimer bridged complex as the main ligand ...

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Abstract

The invention relates to iridium complexes and a preparation method thereof, and an electroluminescent device using the iridium complexes, particularly iridium complexes using 2-(5-(3-pyridyl-1,3,4-oxadiazolyl-2-)phenols as auxiliary ligands. The main ligands in the iridium complex molecules are 2-(4,6-ditrifluoromethylpyridyl)pyridine, 2-(4,6-ditrifluoromethylpyridyl)pyrimidine, 2-(4,6-ditrifluoromethylpyridyl)pyrazine and 2-(4,6-ditrifluoromethylpyridyl)triazine derivatives. The novel iridium complexes provided by the invention have the advantages of high luminescence efficiency, high electron mobility, stable chemical properties, easy sublimation and purification and the like; and the device has favorable properties. The molecular structure of the modifying main ligands can regulate the luminescent intensity and efficiency of the complexes within the green light wavelength range, thereby facilitating the design and production of the organic electroluminescent displays and illuminating light sources.

Description

【Technical Field】 [0001] The present invention relates to the technical field of organic electroluminescence devices, and in particular to a type of iridium complexes, a preparation method thereof, and electroluminescence devices using the iridium complexes. 【Background technique】 [0002] Against the background of increasing global energy demand and the worrying ecological environment, governments of various countries have vigorously developed high-tech-based sustainable energy-saving technologies and industries. Organic electroluminescent devices (OLEDs) have attracted much attention due to their wide viewing angles, high brightness, low energy consumption and many advantages such as flexible devices. They are called the key technology that will dominate the future display world. In recent years, a large number of studies have shown that among many heavy metal complexes, iridium complexes are considered to be the most ideal choice for phosphorescent materials for OLEDs. Has 5d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342C09K2211/1062H10K85/631H10K85/654H10K50/11H10K2101/10H10K50/15H10K50/16H10K50/81H10K50/82H10K77/111H10K85/6572H10K2102/103H10K2102/311
Inventor 郑佑轩潘毅王毅左景林徐秋蕾
Owner AAC MICROTECH CHANGZHOU
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